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<div class="title">feature-vector-test.C</div>  </div>
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<a href="feature-vector-test_8_c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright 2012, Google Inc.</span>
<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment">// </span>
<a name="l00004"></a>00004 <span class="comment">// Redistribution and use in source and binary forms, with or without</span>
<a name="l00005"></a>00005 <span class="comment">// modification, are permitted provided that the following conditions are</span>
<a name="l00006"></a>00006 <span class="comment">// met:</span>
<a name="l00007"></a>00007 <span class="comment">// </span>
<a name="l00008"></a>00008 <span class="comment">//   * Redistributions of source code must retain the above copyright</span>
<a name="l00009"></a>00009 <span class="comment">//     notice, this list of conditions and the following disclaimer.</span>
<a name="l00010"></a>00010 <span class="comment">//   * Redistributions in binary form must reproduce the above</span>
<a name="l00011"></a>00011 <span class="comment">//     copyright notice, this list of conditions and the following disclaimer</span>
<a name="l00012"></a>00012 <span class="comment">//     in the documentation and/or other materials provided with the</span>
<a name="l00013"></a>00013 <span class="comment">//     distribution.</span>
<a name="l00014"></a>00014 <span class="comment">//   * Neither the name of Google Inc. nor the names of its</span>
<a name="l00015"></a>00015 <span class="comment">//     contributors may be used to endorse or promote products derived from</span>
<a name="l00016"></a>00016 <span class="comment">//     this software without specific prior written permission.</span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018 <span class="comment">// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span>
<a name="l00019"></a>00019 <span class="comment">// &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span>
<a name="l00020"></a>00020 <span class="comment">// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR</span>
<a name="l00021"></a>00021 <span class="comment">// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT</span>
<a name="l00022"></a>00022 <span class="comment">// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00023"></a>00023 <span class="comment">// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT</span>
<a name="l00024"></a>00024 <span class="comment">// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,           </span>
<a name="l00025"></a>00025 <span class="comment">// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY           </span>
<a name="l00026"></a>00026 <span class="comment">// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
<a name="l00027"></a>00027 <span class="comment">// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span>
<a name="l00028"></a>00028 <span class="comment">// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00029"></a>00029 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00030"></a>00030 <span class="comment">//</span>
<a name="l00031"></a>00031 <span class="comment">//</span>
<a name="l00035"></a>00035 <span class="comment"></span>
<a name="l00036"></a>00036 <span class="preprocessor">#include &lt;map&gt;</span>
<a name="l00037"></a>00037 
<a name="l00038"></a>00038 <span class="preprocessor">#include &quot;<a class="code" href="feature-vector_8_h.html" title="Defines the reranker::FeatureVector class, which, as it happens, is used to store feature vectors...">feature-vector.H</a>&quot;</span>
<a name="l00039"></a>00039 
<a name="l00040"></a>00040 <span class="keyword">using</span> <a class="code" href="classreranker_1_1_feature_vector.html" title="A class to represent a feature vector, where features are represented by unique identifiers, and feature values are represented by the template type.">reranker::FeatureVector</a>;
<a name="l00041"></a>00041 <span class="keyword">using</span> std::map;
<a name="l00042"></a>00042 <span class="keyword">using</span> std::cout;
<a name="l00043"></a>00043 <span class="keyword">using</span> std::endl;
<a name="l00044"></a>00044 
<a name="l00045"></a>00045 <span class="keywordtype">int</span>
<a name="l00046"></a><a class="code" href="feature-vector-test_8_c.html#a3c04138a5bfe5d72780bb7e82a18e627">00046</a> <a class="code" href="candidate-set-proto-reader-test_8_c.html#a3c04138a5bfe5d72780bb7e82a18e627">main</a>(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv) {
<a name="l00047"></a>00047   map&lt;int, double&gt; features1;
<a name="l00048"></a>00048   features1[0] = 2.0;
<a name="l00049"></a>00049   features1[1] = 4.0;
<a name="l00050"></a>00050   <a class="code" href="classreranker_1_1_feature_vector.html" title="A class to represent a feature vector, where features are represented by unique identifiers, and feature values are represented by the template type.">FeatureVector&lt;int,double&gt;</a> feature_vector1(features1);
<a name="l00051"></a>00051 
<a name="l00052"></a>00052   map&lt;int, double&gt; features2;
<a name="l00053"></a>00053   features2[0] = 4.0;
<a name="l00054"></a>00054   features2[1] = 8.0;
<a name="l00055"></a>00055   features2[2] = 45.0;
<a name="l00056"></a>00056   <a class="code" href="classreranker_1_1_feature_vector.html" title="A class to represent a feature vector, where features are represented by unique identifiers, and feature values are represented by the template type.">FeatureVector&lt;int,double&gt;</a> feature_vector2(features2);
<a name="l00057"></a>00057 
<a name="l00058"></a>00058   cout &lt;&lt; <span class="stringliteral">&quot;Feature vector 1:&quot;</span> &lt;&lt; feature_vector1 &lt;&lt; endl
<a name="l00059"></a>00059        &lt;&lt; <span class="stringliteral">&quot;Feature vector 2:&quot;</span> &lt;&lt; feature_vector2 &lt;&lt; endl
<a name="l00060"></a>00060        &lt;&lt; <span class="stringliteral">&quot;Dot product: &quot;</span> &lt;&lt; feature_vector1.<a class="code" href="classreranker_1_1_feature_vector.html#a03929c2f26faf01b1406074943f99b86" title="Computes the dot product of this feature vector with the specified FeatureVector.">Dot</a>(feature_vector2) &lt;&lt; endl;
<a name="l00061"></a>00061 
<a name="l00062"></a>00062   cout &lt;&lt; <span class="stringliteral">&quot;Weight in feature vector 1 for feature 2: &quot;</span>
<a name="l00063"></a>00063        &lt;&lt; feature_vector1.<a class="code" href="classreranker_1_1_feature_vector.html#a0786ae9b9f6b579a80d8ae601edfd80a" title="Returns the weight of the feature with the specified uid, where crucially features not &quot;present&quot; in t...">GetWeight</a>(2) &lt;&lt; endl;
<a name="l00064"></a>00064   cout &lt;&lt; <span class="stringliteral">&quot;Weight in feature vector 2 for feature 2: &quot;</span>
<a name="l00065"></a>00065        &lt;&lt; feature_vector2.<a class="code" href="classreranker_1_1_feature_vector.html#a0786ae9b9f6b579a80d8ae601edfd80a" title="Returns the weight of the feature with the specified uid, where crucially features not &quot;present&quot; in t...">GetWeight</a>(2) &lt;&lt; endl;
<a name="l00066"></a>00066 
<a name="l00067"></a>00067   cout &lt;&lt; <span class="stringliteral">&quot;Feature vector 1 size: &quot;</span> &lt;&lt; feature_vector1.<a class="code" href="classreranker_1_1_feature_vector.html#a08a5b65bae6cc0bb35e035e5797a00f2" title="Returns the number of non-zero feature components of this feature vector.">size</a>() &lt;&lt; endl
<a name="l00068"></a>00068        &lt;&lt; <span class="stringliteral">&quot;Setting feature 0 to 0...&quot;</span> &lt;&lt; endl;
<a name="l00069"></a>00069   feature_vector1.<a class="code" href="classreranker_1_1_feature_vector.html#ad94d388ef81023981d6924a2020268d2" title="Sets the weight of the specified feature to the specified value.">SetWeight</a>(0, 0.0);
<a name="l00070"></a>00070   cout &lt;&lt; <span class="stringliteral">&quot;New feature vector 1 size: &quot;</span> &lt;&lt; feature_vector1.<a class="code" href="classreranker_1_1_feature_vector.html#a08a5b65bae6cc0bb35e035e5797a00f2" title="Returns the number of non-zero feature components of this feature vector.">size</a>() &lt;&lt; endl;
<a name="l00071"></a>00071 
<a name="l00072"></a>00072   cout &lt;&lt; <span class="stringliteral">&quot;Printing out feature vector 1 using its iterators:&quot;</span> &lt;&lt; endl;
<a name="l00073"></a>00073   <span class="keywordflow">for</span> (<a class="code" href="classreranker_1_1_feature_vector.html" title="A class to represent a feature vector, where features are represented by unique identifiers, and feature values are represented by the template type.">FeatureVector&lt;int,double&gt;::const_iterator</a> it = feature_vector1.<a class="code" href="classreranker_1_1_feature_vector.html#ae0c185e646996daff25fcad9b224eda5" title="Returns a const iterator pointing to the first of the feature-value pairs of this feature vector...">begin</a>();
<a name="l00074"></a>00074        it != feature_vector1.<a class="code" href="classreranker_1_1_feature_vector.html#a9f2539faf4e600c2f75b613763d49fcd" title="Returns a const iterator pointing to the end of the feature-value pairs of this feature vector...">end</a>();
<a name="l00075"></a>00075        ++it) {
<a name="l00076"></a>00076     cout &lt;&lt; <span class="stringliteral">&quot;\t&quot;</span> &lt;&lt; it-&gt;first &lt;&lt; <span class="stringliteral">&quot;=&quot;</span> &lt;&lt; it-&gt;second &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span>;
<a name="l00077"></a>00077   }
<a name="l00078"></a>00078   cout &lt;&lt; <span class="stringliteral">&quot;Done.&quot;</span> &lt;&lt; endl;
<a name="l00079"></a>00079 
<a name="l00080"></a>00080   cout &lt;&lt; <span class="stringliteral">&quot;Printing out feature vector 2 using its iterators:&quot;</span> &lt;&lt; endl;
<a name="l00081"></a>00081   <span class="keywordflow">for</span> (<a class="code" href="classreranker_1_1_feature_vector.html" title="A class to represent a feature vector, where features are represented by unique identifiers, and feature values are represented by the template type.">FeatureVector&lt;int,double&gt;::const_iterator</a> it = feature_vector2.<a class="code" href="classreranker_1_1_feature_vector.html#ae0c185e646996daff25fcad9b224eda5" title="Returns a const iterator pointing to the first of the feature-value pairs of this feature vector...">begin</a>();
<a name="l00082"></a>00082        it != feature_vector2.<a class="code" href="classreranker_1_1_feature_vector.html#a9f2539faf4e600c2f75b613763d49fcd" title="Returns a const iterator pointing to the end of the feature-value pairs of this feature vector...">end</a>();
<a name="l00083"></a>00083        ++it) {
<a name="l00084"></a>00084     cout &lt;&lt; <span class="stringliteral">&quot;\t&quot;</span> &lt;&lt; it-&gt;first &lt;&lt; <span class="stringliteral">&quot;=&quot;</span> &lt;&lt; it-&gt;second &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span>;
<a name="l00085"></a>00085   }
<a name="l00086"></a>00086   cout &lt;&lt; <span class="stringliteral">&quot;Done.&quot;</span> &lt;&lt; endl;
<a name="l00087"></a>00087 
<a name="l00088"></a>00088   cout &lt;&lt; <span class="stringliteral">&quot;Scaling feature vector 2 by 2.0:&quot;</span> &lt;&lt; endl;
<a name="l00089"></a>00089   feature_vector2.<a class="code" href="classreranker_1_1_feature_vector.html#a0535e2a994950ccd367a47fde39faa98" title="Multiplies this vector, in situ, by the specified scalar.">Scale</a>(2.0);
<a name="l00090"></a>00090   cout &lt;&lt; <span class="stringliteral">&quot;\t&quot;</span> &lt;&lt; feature_vector2 &lt;&lt; endl;
<a name="l00091"></a>00091 
<a name="l00092"></a>00092   cout &lt;&lt; <span class="stringliteral">&quot;Adding feature vector 2 scaled by 2.0 to feature vector 1:&quot;</span> &lt;&lt; endl;
<a name="l00093"></a>00093   feature_vector1.<a class="code" href="classreranker_1_1_feature_vector.html#a76c6244a176999e72a54c78726ee718f" title="Modifies this vector so that it equals this vector plus the scaled specified vector.">AddScaledVector</a>(feature_vector2, 2.0);
<a name="l00094"></a>00094   cout &lt;&lt; <span class="stringliteral">&quot;\t&quot;</span> &lt;&lt; feature_vector1 &lt;&lt; endl;
<a name="l00095"></a>00095 
<a name="l00096"></a>00096   cout &lt;&lt; <span class="stringliteral">&quot;Have a nice day!&quot;</span> &lt;&lt; endl;
<a name="l00097"></a>00097 }
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